1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MEDIA_CAST_SENDER_VIDEO_ENCODER_H_ 6 #define MEDIA_CAST_SENDER_VIDEO_ENCODER_H_ 7 8 #include "base/callback.h" 9 #include "base/memory/ref_counted.h" 10 #include "base/memory/scoped_ptr.h" 11 #include "base/memory/weak_ptr.h" 12 #include "base/time/time.h" 13 #include "media/base/video_frame.h" 14 #include "media/cast/cast_config.h" 15 #include "media/cast/cast_environment.h" 16 17 namespace media { 18 namespace cast { 19 20 // All these functions are called from the main cast thread. 21 class VideoEncoder { 22 public: 23 typedef base::Callback<void(scoped_ptr<EncodedFrame>)> 24 FrameEncodedCallback; 25 ~VideoEncoder()26 virtual ~VideoEncoder() {} 27 28 // The video_frame must be valid until the closure callback is called. 29 // The closure callback is called from the video encoder thread as soon as 30 // the encoder is done with the frame; it does not mean that the encoded frame 31 // has been sent out. 32 // Once the encoded frame is ready the frame_encoded_callback is called. 33 virtual bool EncodeVideoFrame( 34 const scoped_refptr<media::VideoFrame>& video_frame, 35 const base::TimeTicks& capture_time, 36 const FrameEncodedCallback& frame_encoded_callback) = 0; 37 38 // Inform the encoder about the new target bit rate. 39 virtual void SetBitRate(int new_bit_rate) = 0; 40 41 // Inform the encoder to encode the next frame as a key frame. 42 virtual void GenerateKeyFrame() = 0; 43 44 // Inform the encoder to only reference frames older or equal to frame_id; 45 virtual void LatestFrameIdToReference(uint32 frame_id) = 0; 46 }; 47 48 } // namespace cast 49 } // namespace media 50 51 #endif // MEDIA_CAST_SENDER_VIDEO_ENCODER_H_ 52